# Claim-to-evidence map · C831

| Main claim | Steps | Sources and reconstruction | Status |
|---|---|---|---|
| Complete mode-bridge recurrence | C733–748 | File18; model/native_mode_fields.json | reconstructed whole field |
| SP/LXX aligned birth family | C743–744,C778,C787–788 | File18; model/aligned_birth_divergence.json | restoredSP comparison; official145; transferred rounding derived |
| Rounded residual mechanism | C749–770 | File51a; model/all_rounding_fields.json | MT literal verification; LXX/SP rule transfer |
| Finite variant supports and Terah triangle | C772–786 | File18; model/finite_birth_configurations.json; model/Terah_triangle.json | finite source states; idealSP lift separately tagged |
| BJ path contraction and fixed575 body | C792–810 | Files20,53,43; model/BJ_spine_residuals.json | source reconstructions and literal surface ledger kept distinct |
| File52c12026/14726 interface | C813,C820 | latest File52c; inherited C731 foundation | integration of admitted one-pass constructions |
| Calendar/shape/weighted invariants | C814–815 | C731 foundation; model/integration_invariants.json | distinct measures and anchored paths |

Each field is one dependent reconstruction. Counts of rows or checks do not count independent discoveries. Exact source hashes are in evidence/SOURCE_MANIFEST.json.